EP2367780A1 - Verfahren und vorrichtung zum herstellen von dimethylether aus methanol - Google Patents
Verfahren und vorrichtung zum herstellen von dimethylether aus methanolInfo
- Publication number
- EP2367780A1 EP2367780A1 EP09775097A EP09775097A EP2367780A1 EP 2367780 A1 EP2367780 A1 EP 2367780A1 EP 09775097 A EP09775097 A EP 09775097A EP 09775097 A EP09775097 A EP 09775097A EP 2367780 A1 EP2367780 A1 EP 2367780A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- column
- meoh
- dme
- product
- distillate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 512
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 title claims abstract description 266
- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007789 gas Substances 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000011541 reaction mixture Substances 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 4
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims description 61
- 239000000203 mixture Substances 0.000 claims description 35
- 238000010992 reflux Methods 0.000 claims description 22
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 239000003599 detergent Substances 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 238000005201 scrubbing Methods 0.000 claims description 2
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004821 distillation Methods 0.000 description 14
- 239000003054 catalyst Substances 0.000 description 6
- 239000002551 biofuel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- DQYBDCGIPTYXML-UHFFFAOYSA-N ethoxyethane;hydrate Chemical compound O.CCOCC DQYBDCGIPTYXML-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000008266 hair spray Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/09—Preparation of ethers by dehydration of compounds containing hydroxy groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
Definitions
- the invention relates to a method and apparatus for producing dimethyl ether (DME) from methanol (MeOH) by reacting, preferably by acid catalytic condensation, MeOH synthesis crude MeOH to DME with elimination of water in a reactor in which the from raw MeOH existing feed mixture and an in-house obtained essentially formed from unreacted MeOH and water of reaction reflux of a column, hereinafter referred to as MeOH column, abandoned and evaporated and the substantially consisting of vaporous MeOH distillate is fed to the reactor.
- DME dimethyl ether
- MeOH column methanol
- MeOH is produced exclusively from the synthesis gases CO 2 / H 2 or CO / H 2 , which in turn come from the reforming of natural gas, residual oils from oil treatment or from the pressure gasification of coal.
- the crude MeOH produced can be further processed directly to DME or worked up by distillation to pure MeOH and then catalytically converted to DME and water.
- the recovered DME product is separated by distillation from unreacted MeOH and water.
- the crude MeOH is subjected to a two- or three-stage distillation in which first the low boilers and the dissolved gases, in particular CO 2 , are removed and then MeOH and water are separated, and the purified MeOH in an adiabatic fixed bed reactor until reaction equilibrium converted to DME.
- the reactor product consists of a mixture of DME, water, unreacted MeOH, and minor amounts of noncondensable light gases
- the reactor product is treated in a two-stage distillation with DME of unreacted MeOH and water of reaction and in the first distillation stage in the head in the second distillation stage in the head, the MeOH contained in the first stage bottoms product of the Reaction water are separated and the recovered MeOH flows back into the reactor.
- the non-condensible light gases discharged at the top of the first distillation stage with the DME are saturated with DME, which is separated from the noncondensable gases in a gas wash with MeOH as a detergent before leaving the system at the top of the gas scrubbing stage as low boilers.
- biofuel Directive 2003/30 / EC of the European Parliament and of the Council on the promotion of the use of biofuels or other renewable fuels in the transport sector qualifies as biofuel, it may contain impurities which are not permitted in high purity DME
- the distillation of the MeOH is dispensed with and the crude MeOH is fed directly to the DME reactor In the process described in US Pat. No.
- No. 6,740,783 B1 describes a process for the preparation of DME from crude MeOH using a DME reactor with a fixed bed of zeolite catalyst, which is first deactivated by doping with metals in order to increase the DME selectivity of the catalyst.
- a steady supply of metals leads in the long term to a continuous deactivation and thus to a shortening of the lifetime of the catalyst.
- the subject of EP 1396483 B1 is a process for the preparation of DME in which crude MEOH is dehydrated in the vapor phase in the presence of an activated Na 2 doped Al 2 O 3 catalyst. Care must be taken to a limited Na-doping, so as not to affect the conversion of the catalyst. This means that the crude MeOH must be largely free of metal and NH 4 ions. For the crude MeOH provided and its evaporation, therefore, the entrainment of neutralizing agent should be carefully avoided.
- JP 2004161672 A deals with a crude MeOH vaporizer which allows partial evaporation of the crude MeOH, with the unvaporized mixture of MeOH and water together with the unreacted MeOH and the water of reaction from the DME reactor in a separate low-pressure distillation column is separated into process water and reflux MeOH.
- the supercooled low-water liquid reflux MeOH is contacted with the evaporated crude MeOH to lower the water concentration in the crude MeOH fed to the DME reactor becomes. It is therefore envisaged to conduct unvaporized MeOH to the non-evaporated water of the crude MeOH to the reflux MeOH column.
- the arrangement of a gas scrubber can be dispensed with. Instead, in a final cooler operated with cold water or a refrigerant, the DME discharged with the non-condensable gases can be largely recovered.
- the object underlying the invention is to design the method described above so that the lowest possible consumption of resources achieved, the installed heat exchanger performance improved and the life of the catalyst are not affected.
- reaction mixture withdrawn from the reactor in a column hereinafter referred to as a mixture column is separated into a predominantly consisting of water bottom product and in a predominantly formed from DME and MeOH distillate, the distillate in a column, hereinafter referred to as DME column, into a substantially DME and over Head deliverable non-condensable gas containing distillate and in a low water formed from MeOH bottoms product which is fed to the head of the MeOH column is separated.
- distillate defines the product removed in a distillation or rectification column as a side product or as an overhead product.
- the bottom product formed from low-water MeOH of the DME column is fed to the top of the MeOH column or mixed with the withdrawn from the feed column bottom product.
- the amount of water introduced into the DME column is about the reflux ratio of the generated at the top of the column by condensation of a portion of the top product and at the top of the column abandoned liquid amount and discharged to the DME column Head product quantity adjustable.
- Another feature of the invention is the fact that a portion of the steam generated by evaporation of the reflux of the substantially consisting of water bottoms of the MeOH column steam is passed into the bottom of the mixture column and lowered in this way the DME content in the sump.
- An embodiment of the invention is further to be seen in that condenses the consisting essentially of DME distillate of the DME column and given up part of the condensate as reflux to the head of the DME column and the other part of the DME condensate is discharged. Characterized in that at the same time consisting of low-water liquid MeOH bottom product of the DME column on Head of the MeOH column is abandoned, can be dispensed with the condensation in the MeOH column.
- Another feature of the invention resides in the fact that the DME discharged with the non-condensable gases is washed out in a wash column, preferably with MeOH, and passed into the mixture column.
- the gases dissolved therein and light-boiling components are separated in a forerunner column and the distillate is discharged, whereby the quality of the produced DME is improved and the amount of DME entrained with the non-condensable gases from the DME column is reduced.
- the withdrawn from the feed column bottom product is preheated prior to entry into the MeOH column and / or partially evaporated.
- a further embodiment of the process according to the invention consists in the fact that the DME discharged at the top of the DME column with the non-condensable gases is washed out in a wash column, preferably with MeOH, and the produced bottom product is passed into the DME column and / or the crude product. MeOH is added before entering the MeOH column.
- raw MeOH branched off from the feed of the crude MeOH can be introduced as detergent at the top of the wash column.
- the crude methanol contains only small amounts of dissolved gases, can be dispensed with the arrangement of a wash column and instead used with cold water or refrigerant, such as DME, operated end cooler with which the DME discharged with the non-condensable gases can be recovered.
- cold water or refrigerant such as DME
- the bottom product of the MeOH column which consists predominantly of water, is discharged from the process or fed to the lower part of the mixture column and then discharged via the bottom of the mixture column.
- a portion of the gaseous distillate of the MeOH column is passed into the bottom of the DME column.
- the DME column is arranged on the MeOH column.
- the two columns are coupled via the distillate of the MeOH column and the bottom product of the DME column, so that the MeOH column without reflux condenser and the DME column can be operated without an evaporator.
- a modification of the process according to the invention consists in that vaporous distillate of the mixture column predominantly consisting of DME and MeOH into the bottom of a rectification column, hereinafter referred to as DME product Column referred to is fed, the liquid MeOH-containing bottom product of this column at the top of a rectification column, hereinafter referred to as MeOH-reflux column, is charged, with their distillate passed into the bottom of the DME product column and the bottom product of the head of MeOH Column is supplied.
- the DME product column designed as a reinforcing part is arranged on the mixture column and the MeOH reflux column formed as a stripping section is arranged on the MeOH column.
- a feed stream consisting of crude MeOH with a MeOH content of 75% by weight is fed via line (1) into the feed column (2), in which at an average temperature of 80 ° C. and a mean temperature Pressure of 3 bar [a] the gases dissolved in the crude MeOH, such as CO, CO 2 , CH 4 and the low-boiling hydrocarbons and discharged via line (3) for other uses.
- the gas mixture withdrawn at the bottom of the reactor (12) is fed via line (13) to the heat exchanger group (10) and recuperatively cooled before being fed via line (14) to the mixture column (15).
- the gas mixture is separated at a mean pressure of 15 bar [a] and an average temperature of 150 ° C in a water-rich bottom product and in a low-water overhead product, wherein the top product is less than 5 wt.%, preferably less than 2% by weight, contains water.
- the water-rich bottom product is passed via line (16) to the MeOH column (7).
- the low-water top product is fed via line (17) of the DME column (18), which operates at an average temperature of 100 ° C and a pressure of 13.5 bar [a].
- DME is withdrawn and passed via line (19) to the plant boundary.
- the bottom product of the DME column (18) consisting predominantly of MeOH with small amounts of water is pumped via line (20) to the top of the MeOH column (7) and serves as reflux for the enrichment section of the MeOH column (7).
- a partial stream of the top product of the MeOH column (7) flowing in line (9) can be branched off and fed via line (21) into the bottom of the DME column.
- Column (18) are introduced, so that can be dispensed with in this case to an evaporator circuit.
- the non-condensable gases in the DME column (18) are withdrawn overhead and passed via line (22) in the bottom of the washing stage (23), in which at an average pressure of 10 bar [a] and a mean temperature of 75 ° C, the DME contained in the non-condensable gases with branched off from the line (4) and recovered via line (24) at the top of the washing stage (23) MeOH is recovered.
- the gaseous top product of the washing stage (23) is combined via line (25) with the top product of the feed column (2) flowing off via line (3) and discharged for other use.
- the DME-containing detergent is pumped from the bottom of the washing stage (23) via line (26) in the mixture column (15).
- the bottom product of the washing stage (23) via line (27) either in the DME column (18) or via line (28) in the line (6) of the MeOH column (7) inflowing MeOH stream can be fed.
- the mixture column (15) can be operated without evaporator circuit.
- the bottom product of the MeOH reflux column (32) flows via line (20) to the top of the MeOH column (7), while the top product is passed via line (33) into the bottom of the DME product column (30).
- the partial stream branched off from the top product of the MeOH column (9) flowing in line (9) is fed via line (21) to the bottom of the MeOH return column (32).
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008058931A DE102008058931B4 (de) | 2008-11-25 | 2008-11-25 | Verfahren und Vorrichtung zum Herstellen von Dimethylether aus Methanol |
PCT/EP2009/008237 WO2010060566A1 (de) | 2008-11-25 | 2009-11-19 | Verfahren und vorrichtung zum herstellen von dimethylether aus methanol |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2367780A1 true EP2367780A1 (de) | 2011-09-28 |
EP2367780B1 EP2367780B1 (de) | 2014-11-19 |
Family
ID=41667534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09775097.0A Active EP2367780B1 (de) | 2008-11-25 | 2009-11-19 | Verfahren und vorrichtung zum herstellen von dimethylether aus methanol |
Country Status (8)
Country | Link |
---|---|
US (1) | US8884074B2 (de) |
EP (1) | EP2367780B1 (de) |
CN (1) | CN102224124B (de) |
DE (1) | DE102008058931B4 (de) |
MY (1) | MY158397A (de) |
RU (1) | RU2505522C2 (de) |
SG (1) | SG171810A1 (de) |
WO (1) | WO2010060566A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011014892A1 (de) | 2011-03-23 | 2012-09-27 | Lurgi Gmbh | Verfahren und Anlage zur Herstellung von niedermolekularen Olefinen |
DE102011114367A1 (de) | 2011-09-27 | 2013-03-28 | Lurgi Gmbh | Verfahren und Anlage zur Herstellung von Olefinen aus Dimethylether |
WO2015193188A1 (en) * | 2014-06-20 | 2015-12-23 | Bp Chemicals Limited | Process for the co-production of acetic acid and dimethyl ether |
CN115716780A (zh) * | 2014-06-20 | 2023-02-28 | 英力士乙酰英国有限公司 | 从一氧化碳、氢气和乙酸甲酯的气体混合物生产二甲醚的方法 |
CN106883101A (zh) * | 2017-03-14 | 2017-06-23 | 北京理工大学 | 一种甲醇基二甲醚燃料生产与锅炉供热系统及方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59199648A (ja) * | 1983-04-27 | 1984-11-12 | Mitsubishi Chem Ind Ltd | ジメチルエ−テルの製造法 |
AU603070B2 (en) | 1986-11-18 | 1990-11-08 | Rwe-Dea Aktiengesellschaft Fur Mineraloel Und Chemie | Process for the purification of dimethylether |
US5750799A (en) * | 1995-03-15 | 1998-05-12 | Starchem, Inc. | Dimethyl ether production and recovery from methanol |
US6924399B2 (en) * | 2001-12-28 | 2005-08-02 | Mitsubishi Heavy Industries, Ltd. | Method of manufacturing dimethyl ether |
JP4309627B2 (ja) | 2002-09-06 | 2009-08-05 | 東洋エンジニアリング株式会社 | ジメチルエーテルの製造方法 |
JP4414645B2 (ja) | 2002-11-13 | 2010-02-10 | 日揮株式会社 | ジメチルエーテルの製造方法 |
JP4553231B2 (ja) | 2002-11-13 | 2010-09-29 | 日揮株式会社 | ジメチルエーテルの製造方法 |
KR100454091B1 (ko) | 2002-12-11 | 2004-10-26 | 한국화학연구원 | 미정제 메탄올로부터 디메틸에테르의 제조방법 |
RU2282613C2 (ru) * | 2004-08-10 | 2006-08-27 | Открытое акционерное общество Научно-исследовательский институт "Ярсинтез" (ОАО НИИ "Ярсинтез") | Способ получения диметилового эфира высокой чистоты |
CN1830934A (zh) | 2006-04-25 | 2006-09-13 | 成都天成碳一化工有限公司 | 以甲醇为原料生产二甲醚的方法 |
CN100366597C (zh) | 2006-07-21 | 2008-02-06 | 新奥新能(北京)科技有限公司 | 新型二甲醚生产工艺 |
KR101340777B1 (ko) * | 2006-08-31 | 2013-12-31 | 에스케이이노베이션 주식회사 | 디메틸에테르의 제조공정 |
-
2008
- 2008-11-25 DE DE102008058931A patent/DE102008058931B4/de not_active Expired - Fee Related
-
2009
- 2009-11-19 SG SG2011037694A patent/SG171810A1/en unknown
- 2009-11-19 RU RU2011125993/04A patent/RU2505522C2/ru active
- 2009-11-19 EP EP09775097.0A patent/EP2367780B1/de active Active
- 2009-11-19 US US13/130,611 patent/US8884074B2/en active Active
- 2009-11-19 MY MYPI2011001534A patent/MY158397A/en unknown
- 2009-11-19 CN CN200980147317.5A patent/CN102224124B/zh active Active
- 2009-11-19 WO PCT/EP2009/008237 patent/WO2010060566A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010060566A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102224124B (zh) | 2015-06-03 |
US20110295043A1 (en) | 2011-12-01 |
RU2011125993A (ru) | 2013-01-10 |
US8884074B2 (en) | 2014-11-11 |
SG171810A1 (en) | 2011-07-28 |
EP2367780B1 (de) | 2014-11-19 |
DE102008058931A1 (de) | 2010-06-02 |
CN102224124A (zh) | 2011-10-19 |
RU2505522C2 (ru) | 2014-01-27 |
DE102008058931B4 (de) | 2010-12-30 |
MY158397A (en) | 2016-10-14 |
WO2010060566A1 (de) | 2010-06-03 |
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Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110620 |
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